What Is Coolant?

Coolant Car Check

What is coolant? Coolant is a mixture of antifreeze and water that regulates your engine’s temperature. Typically in a ratio of 50:50, coolant transfers heat from the engine block and parts to prevent overheating. Whether you have a new Honda or a used Honda, engine coolant is crucial to your car’s health. Learn how to check engine coolant levels with the service team at Dover Honda and to see if you need to schedule service for a coolant change. 

How To Check Coolant Levels

Learning how to check your coolant level is easy! You don’t even need to open the radiator cap. Simply check the markings on the side of your coolant reservoir to see if the liquid reaches the “full” marking line. If it doesn’t, remove the radiator cap and add more coolant. You can check your vehicle’s owner’s manual to see what kind of coolant you need and if it needs to be mixed with water or if you need to buy a premixed solution. You can find coolant for your vehicle at your Dover Honda service center or a Portsmouth auto store. 

DIY TIP: If you need to add more coolant to your engine, make sure the engine has cooled before adding it. Also, do not attempt to open the radiator cap while the engine is hot. Your radiator is a pressurized system, and opening it while it’s still hot can result in hot water/coolant boiling over and potentially harming you. 

When To Schedule A Service Appointment

While you’re checking your coolant levels, it’s a good idea to check your radiator connections and hoses for leaks or damages and also check the condition of your coolant. Coolant is thinner than oil but thicker than water. If you notice the liquid has a sludgy appearance, it’s time to schedule a service appointment at your local Rochester-area Honda dealership. Your car could have an internal gasket leak, and your coolant will quickly drain as you drive. Low coolant levels put the engine at risk of overheating and being severely damaged.

Usually, your coolant is blue, green, yellow, or red. If it’s brownish or colorless, you will need to have the system flushed and the fluid replaced.

Your vehicle’s coolant levels will deplete over time, so we recommend you check your coolant level every three to six months to ensure that everything looks right and your Honda continues to run at its best. Of course, if you notice your car running hotter than normal before then, contact our team to have it inspected.

Get Honda Service At Dover Honda!

You can have the service technicians at Dover Honda check your coolant levels and radiator when you come in for your regularly scheduled maintenance! Schedule a service appointment with us today, then browse our service specials to save on your next oil change or tire rotation! We look forward to helping you keep your Honda running smoothly on Somersworth roads!

More from Dover Honda

  • 2021 Honda Civic Interior Features

    For great fuel economy and dependability in Portsmouth, you know that the 2021 Honda Civic is a driver favorite for a reason. The Honda Civic design offers state-of-the-art style and utility in an affordable package you’re going to love! Take a look inside at the Honda Civic interior with Dover Honda, learn more about the Honda…

  • What Are the 2021 Honda HR-V Safety Ratings?

    The 2021 HR-V is well-loved in Dover and Portsmouth for its balanced blend of admirable fuel economy and its roomy interior. But there’s another perk to owning or leasing this Honda subcompact SUV: it’s stellar safety ratings. What are the 2021 Honda HR-V safety ratings from the NHTSA and IIHS? Furthermore, what are some noteworthy…

  • 2021 Honda CR-V Interior Dimensions & Features

      The new Honda CR-V is an SUV that’s kept its consumer popularity through the years. This practical interior with an abundance of drive-enhancing features has always been a key highlight of this model. Learn more about the 2021 Honda CR-V interior with us at Dover Honda today, then schedule a test drive to fully experience…

Saved Vehicles


You don't have any saved vehicles!

Look for this link on your favorites:


Once you've saved some vehicles, you can view them here at any time.

Contact Us


Call Now

1 Dover Point Rd • Dover, NH 03820

Get Directions

Today's Hours:

Open Today! Sales: 9am-7pm

Open Today! Service: 8am-6pm

Dover Honda 43.1757948, -70.8672731.